Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 260 · 40 questions

What you do (Pull down, lift up): 1. Push the pencil through the thread reel; an adult holds the pencil ends level. 2. Tie the paper cup to one end of the string and lay the string over the reel. 3. Put coins in the cup and pull the other end down. 4. Feel how hard you pull; never stand under the load or wrap string round your fingers.

1. 1.True or false: a flagpole is an inclined plane. (a) True (b) False
2. 2.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer
3. 3.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a battery cell (d) string
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) a pencil (d) a battery cell
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a pencil (d) yeast
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
9. 9.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) a pencil (d) a small paper cup
11. 11.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same cup of coins”? (a) we measure it (b) we change it (c) we keep it the same
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we keep it the same (c) we measure it
14. 14.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same string (c) how hard we must pull (d) number of pulleys
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a balloon (c) a small paper cup (d) coins as the load
17. 17.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
18. 18.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
19. 19.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
20. 20.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
21. 21.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
22. 22.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) magnet (d) rope
23. 23.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a ramp (c) a crowbar (d) a flagpole
24. 24.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
25. 25.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
26. 26.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a tap handle (c) a spoon lifting a lid (d) a well pulley
27. 27.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
28. 28.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
29. 29.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
30. 30.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the bench (c) on the blackboard (d) in the tap
31. 31.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
32. 32.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 10 cm (d) 40 cm
33. 33.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a sloping road (c) a bottle opener (d) a well pulley
34. 34.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) yeast (d) a magnet
36. 36.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
37. 37.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
38. 38.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
39. 39.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
40. 40.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False

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